Airtac SAI125 Standard Air Cylinder SAI125X750
The AirTAC Airtac SAI125 Standard Air Cylinder SAI125X750 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 750mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ125 mm
- Stroke750 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAI125 Standard Air Cylinder SAI125X750
The AirTAC SAI125X750 is a double-acting ISO 15552 profile cylinder engineered for heavy-duty automation. It provides a robust push force of 6136 N and a pull force of 5734 N at 0.5 MPa, making it ideal for moving substantial payloads along its 750 mm stroke. The extruded aluminum barrel design omits tie-rods, offering a clean exterior that simplifies the mounting of accessories.
This specific configuration utilizes a standard carbon steel piston rod and PT tapered port threads. Because it lacks a built-in magnet, external position sensing must be achieved through mechanical limit switches rather than the cylinder's sensor grooves. The adjustable air cushions at both ends absorb kinetic energy effectively, which is critical for a mass of this size operating within the 30-500 mm/s speed range.
Airtac SAI125 Standard Air Cylinder SAI125X750 Technical Specifications
| Model | Airtac SAI125 Standard Air Cylinder SAI125X750 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 750 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAI125 Standard Air Cylinder SAI125X750
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×750 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAI125 Standard Air Cylinder SAI125X750 Is Used
Heavy Stamping
Provides the 6136 N force required to actuate large forming presses and heavy-duty stamping dies across the 750 mm travel.
Pallet Diversion
Diverts or halts heavy loaded pallets on conveyor lines, utilizing adjustable cushions to safely decelerate high moving masses.
Automated Welding
Positions large automotive subframes or heavy metal assemblies into welding fixtures with precise, repeatable 750 mm strokes.
Is the Airtac SAI125 Standard Air Cylinder SAI125X750 the Right Cylinder?
Selecting this 125 mm bore is appropriate when 100 mm cylinders (offering 3927 N push at 0.5 MPa) lack the necessary thrust for high-inertia loads. Conversely, if your application exceeds 6136 N, stepping up to the 160 mm bore yields 10053 N. For a 750 mm stroke, the extended rod is highly susceptible to bending under side loads; always incorporate external linear guides or use a guided cylinder carriage to prevent premature rod-bearing wear. To mount this ISO 15552 unit as a drop-in replacement, match the 125 mm bore, 750 mm stroke, G1/2 port, and choose appropriate accessories like FA flanges or TC trunnions.
Note that a standard SAI cylinder will drift if air pressure is lost. If your machinery requires fail-safe load holding on this 750 mm stroke, integrate an external pilot-operated check valve or specify the SAIL variant for its pneumatic locking mechanism.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAI125 Standard Air Cylinder SAI125X750 FAQ
At an operating pressure of 0.5 MPa, the SAI125X750 generates a push force of 6136 N and a pull force of 5734 N. At 0.7 MPa, the push force increases to 8590 N.
Yes, the SAI125X750 is dimensionally interchangeable per ISO 15552. You can drop it in to replace other ISO 15552 profile cylinders with a 125 mm bore, 750 mm stroke, and G1/2 port, provided your mounting accessories match.
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